小梁动脉再分支进入白髓为中央动脉（central artery）。中央动脉的主支穿出白髓，分成许多直行分支，互不吻合，形似笔毛，称笔毛动脉（penicillar artery），进人脾索。
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视网膜中央动脉 central retinal artery ; CRA ; [解剖] central artery of retina ; [解剖] arteria centralis retinae
视网膜中央动脉阻塞 central retinal artery occlusion ; CRAO ; retinal artery occlusion ; RAO
中央动脉阻塞 central retinal artery occlusion ; CRAO
旁中央动脉 [解剖] paracentral artery ; [解剖] arteria paracentralis
是视网膜中央动脉 central retinal artery ; CRA
后内侧中央动脉 [解剖] posteromedial central arteries ; [解剖] arteriae centrales posteromediales
前内侧中央动脉 [解剖] anteromedial central arteries
长中央动脉 [解剖] arteria centralis longa ; [解剖] long central artery
后外侧中央动脉 [解剖] posterolateral central arteries ; [解剖] arteriae centrales posterolaterales
目的：观察人窦房结胶原纤维网架的构筑及其与窦房结中央动脉的关系。
Objective:To investigate the architecture of collagen fibers of human sinoatrial node and its relationship to the central artery penetrated to the node.
结论视网膜中央动脉阻塞介入溶栓治疗可使大部分患者视力不同程度的提高。
Conclusions Thrombolysis via super-selective ophthalmic artery catheterization for CRAO can improve the visual acuity of most of the patients in different degrees.
彩色多普勒表现视网膜中央动脉(CRA)红色血流信号进入肿瘤内呈分支状。
Color Doppler imaging suggested red blood flow signal of central retinal artery (CRA) branched into tumor.
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